Although we seldom talk about them on the blog, our husbands are big supporters and contributors to Ed to Save the World. All three of them have backgrounds in education and their advice, expertise, and humor are invaluable to our operation. 458 more words

## Tags » Mathematical Thinking

#### A "new to me" proof that there are infinitely many primes

Last evening I saw Patrick Honner link to a Richard Green post discussing a prime number theorem he saw on Cut the Knot’s website:

466 more wordsRichard Green (

#### To Prove the Truth of Something, Don't Try to Prove It, Try to Disprove It

An additional course I’m currently taking is Introduction to Mathematical Thinking with Keith Devlin of Standford, which is delivered on Coursera. Prof. Devlin posted a thought provoking… 64 more words

#### Chapter 3 of Modeling data with functional programming in R is out

Chapter 3 of my book “Modeling data with functional programming in R” is available for download. This chapter describes map-vectorization and how it’s used in R. 137 more words

#### Sharing Our Math Strategies Using Educreations

Second grade has spent some time tinkering with Educreations. Educreations is a screencasting tool for iPad as well as a limited web-based program for computers. 778 more words

#### Do all Americans have the same age?

*With a special Bonus Feature: A correct proof of Fermat’s Last Theorem that fits in a Tweet.*

When the students in my Introduction to Mathematical Thinking… 1,256 more words

#### How is it going this time?

My Mathematical Thinking MOOC is now starting its ninth week out of a possible ten. (The last two weeks are optional, for those wanting to get more heavily involved in the mathematics.) 938 more words